<template>
  <div class="list" ref="wrapper">
    <div>

      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper" >
            <div class="button">{{ this.$store.state.city }}</div>
          </div>
        </div>
      </div>

      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list" >
          <div class="button-wrapper"
               v-for="item of hot"
               :key="item.id"
               @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>

      <div class="area"
           v-for="(item,key) of cities"
           :key="key"
           :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  export default {
    name: 'CityList',
    props:{
      hot: Array,
      cities: Object,
      letter: String,
    },
    mounted: function () {
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
    methods:{
      handleCityClick: function (city) {
        this.$store.commit('changeCity',city);
        this.$router.push("/")
      }
    },

    watch:{
      letter: function () {
        if(this.letter){
          const element = this.$refs[this.letter][0];
          this.scroll.scrollToElement(element);
        }
      }
    }
  }
</script>

<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      backgound: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      padding: .1rem .6rem .1rem .1rem
      overflow: hidden
      .button-wrapper
        width: 33.33%
        float: left
        .button
          text-align: center
          margin: .1rem
          padding: .1rem 0
          border: .02rem solid #ccc
          border-radius: 3rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
